# flex a .ll file

# search flex
MACRO(FIND_GENGETOPT)
	IF(NOT GENGETOPT_EXECUTABLE)
		FIND_PROGRAM(GENGETOPT_EXECUTABLE gengetopt)
		IF (NOT GENGETOPT_EXECUTABLE)
			MESSAGE(FATAL_ERROR "gengetopt not found - aborting")
		ENDIF (NOT GENGETOPT_EXECUTABLE)
	ENDIF(NOT GENGETOPT_EXECUTABLE)
ENDMACRO(FIND_GENGETOPT)

MACRO(ADD_GENGETOPT_FILES _sources )
	FIND_GENGETOPT()

	FOREACH (_current_FILE ${ARGN})
		GET_FILENAME_COMPONENT(_in ${_current_FILE} ABSOLUTE)
		GET_FILENAME_COMPONENT(_basename ${_current_FILE} NAME_WE)

		SET(_out ${CMAKE_CURRENT_BINARY_DIR}/${_basename}.c)
		SET(_header ${CMAKE_CURRENT_BINARY_DIR}/${_basename}.h)

		ADD_CUSTOM_COMMAND(
			OUTPUT ${_out} ${_header}
			COMMAND ${GENGETOPT_EXECUTABLE}
			ARGS
			--input=${_in}
			DEPENDS ${_in}
			)

		SET(${_sources} ${${_sources}} ${_out} )
		SET(${_sources} ${${_sources}} ${_header} )
	ENDFOREACH (_current_FILE)
ENDMACRO(ADD_GENGETOPT_FILES)

